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22 lines
706 B
Plaintext
22 lines
706 B
Plaintext
select @@global.extra_port;
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@@global.extra_port
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0
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select @@session.extra_port;
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ERROR HY000: Variable 'extra_port' is a GLOBAL variable
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show global variables like 'extra_port';
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Variable_name Value
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extra_port 0
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show session variables like 'extra_port';
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Variable_name Value
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extra_port 0
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select * from information_schema.global_variables where variable_name='extra_port';
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VARIABLE_NAME VARIABLE_VALUE
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EXTRA_PORT 0
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select * from information_schema.session_variables where variable_name='extra_port';
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VARIABLE_NAME VARIABLE_VALUE
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EXTRA_PORT 0
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set global extra_port=1;
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ERROR HY000: Variable 'extra_port' is a read only variable
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set session extra_port=1;
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ERROR HY000: Variable 'extra_port' is a read only variable
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